|Plot||Fire at Susan and Gordon's Part 1|
|Air date||February 22, 1990|
|Season||Season 21 (1989-1990)|
- "Six Kids Subtraction": Kids in a classroom sing about subtraction as each one is taken home.
- "Water Conservation": Frank the fish calls Carl and tells him not to leave the water running while brushing his teeth, otherwise the lake will be dry.
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|Episode 2687||Episode 2690|